There are
2,081 mi
from Decatur, IL to San Anselmo, CA
That's the driving distance. It would take 1 day 12 hours to go from Decatur, Illinois to San Anselmo, California.
The flight distance (direct flight from Decatur, IL to San Anselmo, CA) is 1,800.88 mi.
2,081 mi = 3.22 kms